# -*- coding: utf-8 -*-
"""
System Profiler Module

Interface with macOS's command-line System Profiler utility to get
information about package receipts and installed applications.

.. versionadded:: 2015.5.0

"""

from __future__ import absolute_import, print_function, unicode_literals

import plistlib
import subprocess

import salt.utils.path
from salt.ext import six

PROFILER_BINARY = "/usr/sbin/system_profiler"


def __virtual__():
    """
    Check to see if the system_profiler binary is available
    """
    PROFILER_BINARY = salt.utils.path.which("system_profiler")

    if PROFILER_BINARY:
        return True
    return (
        False,
        "The system_profiler execution module cannot be loaded: "
        "system_profiler unavailable.",
    )


def _call_system_profiler(datatype):
    """
    Call out to system_profiler.  Return a dictionary
    of the stuff we are interested in.
    """

    p = subprocess.Popen(
        [PROFILER_BINARY, "-detailLevel", "full", "-xml", datatype],
        stdout=subprocess.PIPE,
    )
    (sysprofresults, sysprof_stderr) = p.communicate(input=None)

    if six.PY2:
        plist = plistlib.readPlistFromString(sysprofresults)
    else:
        plist = plistlib.readPlistFromBytes(sysprofresults)

    try:
        apps = plist[0]["_items"]
    except (IndexError, KeyError):
        apps = []

    return apps


def receipts():
    """
    Return the results of a call to
    ``system_profiler -xml -detail full SPInstallHistoryDataType``
    as a dictionary.  Top-level keys of the dictionary
    are the names of each set of install receipts, since
    there can be multiple receipts with the same name.
    Contents of each key are a list of dictionaries.

    CLI Example:

    .. code-block:: bash

        salt '*' systemprofiler.receipts
    """

    apps = _call_system_profiler("SPInstallHistoryDataType")

    appdict = {}

    for a in apps:
        details = dict(a)
        details.pop("_name")
        if "install_date" in details:
            details["install_date"] = details["install_date"].strftime(
                "%Y-%m-%d %H:%M:%S"
            )
        if "info" in details:
            try:
                details["info"] = "{0}: {1}".format(
                    details["info"][0], details["info"][1].strftime("%Y-%m-%d %H:%M:%S")
                )
            except (IndexError, AttributeError):
                pass

        if a["_name"] not in appdict:
            appdict[a["_name"]] = []

        appdict[a["_name"]].append(details)

    return appdict


def applications():
    """
    Return the results of a call to
    ``system_profiler -xml -detail full SPApplicationsDataType``
    as a dictionary.  Top-level keys of the dictionary
    are the names of each set of install receipts, since
    there can be multiple receipts with the same name.
    Contents of each key are a list of dictionaries.

    Note that this can take a long time depending on how many
    applications are installed on the target Mac.

    CLI Example:

    .. code-block:: bash

        salt '*' systemprofiler.applications
    """

    apps = _call_system_profiler("SPApplicationsDataType")

    appdict = {}

    for a in apps:
        details = dict(a)
        details.pop("_name")
        if "lastModified" in details:
            details["lastModified"] = details["lastModified"].strftime(
                "%Y-%m-%d %H:%M:%S"
            )
        if "info" in details:
            try:
                details["info"] = "{0}: {1}".format(
                    details["info"][0], details["info"][1].strftime("%Y-%m-%d %H:%M:%S")
                )
            except (IndexError, AttributeError):
                pass

        if a["_name"] not in appdict:
            appdict[a["_name"]] = []

        appdict[a["_name"]].append(details)

    return appdict
